System of electrical regulation



'E. BAUER.

SYSTEM OF ELECTRICAL REGULATION.

APPLICATION FILED JAN. 25. 1918.

1,380,764. PatentedJune 7, 1921.

ILL I J I JMFIL INVENTOR. Ern s2 Bauer ATTORNEY.

W I TNESS:

UNITED STATES PATENT OFFICE.

ERNST BAUER, OF NIAGARA FALLS, YORK, ASSIGNOR TO U. S. LIGHT & HEAT CORPORATION, OF NIAGARA FALLS, NEW YORK, A CORPORATION OF NEW YORK.

SYSTEM OF ELECTRICAL REGULATION.

To all whom it may concern: Be it known that I, ERNST BAUER, a citizen of the United States, residing at Niagara Falls, in the county of Niagara and,

to drive a generator which supplies a storage battery and, translation circuit in parallel. Inasmuch as it is necessary to charge a storage battery at higher Voltage than will be delivered by said battery on discharge, it is common to provide resistance means in the circuit of the translation devices to out down the voltage to said translation devices when the generator is charging the storage batter fori n of a compressible rheostat. -When the generator is inoperative and the storage battery is not in a highly charged state, the resistance of the compressible rheostat should be a minimum. Difiiculty has been experienced in practice, in reducing the resistance of the rheostat to a sufiiciently low value under theconditions referred to.

An object of the present invention is to provide a system involving a variable speed generator, "a storage battery and .a translation circuit, together with compressible pile means for regulating the voltage upon the lamp circuit, in which-system a wide range of regulation may be provided for.

A further object is to provide a system of the kindreferredtoin which the resistance of the compressible pile may be reduced to a minimum when the voltage across the battery is reduced to a predetermined value and wherein, upon rise in said battery voltage,

the compressible pile will have'its resistance varied to hold a substantially constant voltage across the translation circuit.

A further object is to provide a system of the kind referred .to in which a minimum variation in the voltage across the translation circuit will occur when the load is transferred from the battery tothe generator, or vice versa.

A further object is to provide a system of Specification of Letters Patent.

Such resistance means often takes the Patented J une '7, 1921.

Application filed January 25, 1918. Serial No. 213,620.

the kind referred to involving only simple mechanism which is very little likely to get out of order. I

Further objects will be apparent as the description proceeds.

Referring to the drawings Figure 1 represents schematically one embod ment of the present invention.

Flg. 2 represents a detail.

A variable speed generator which may be driven from the axle of a car is represented by the numeral 1. Said generator 1 is adapted to supply mains 2 and 3, across whlch may be connected a storage battery 4 and a translation circuit 5. An automatic switch 6 will be inserted between the genertranslating devices. A switch 4' may be provided in the battery circuit;

In the translation circuit 5 1s a compressible rheostat 7 represented in the drawing as consisting of a pair of compressible piles connected in parallel. I It will be understood that the invention is not limited to a pair of compressible pileshut is applicable to a rheostat having any desired numberof piles. Said rheostat 7 is adapted to be operated by the lever 8 pivoted at thepoint 9. The lever 8 is in turn adapted to be operated by a bell crank lever 10 pivoted at rthe point 11. Said bell crank lever 10 is controlled by a plunger .12. v Said plunger 12 is adapted to be operated by a solenoid 13 which may be connected across the translation circuit 5 through an adjustable resistance 14'. Said solenoid 13 may be mounted withina suitable frame lUxThe plunger 12 may have -'nected across the battery circuit through adjustable resistance 18.- Said solenoid 17 is themagnet 16. Said magnet 16 is pro-1 be described herein.

adapted to move a plunger 19 against the tension of a spring 20. The lever 8 is provided with an-upstanding lug 21 which is adapted to cooperate with a spring 22,1epresented in larger scale in Fig. 2L Said spring. 22 is mounted upon a rod 23 which is fastened to and adapted to move with the plunger .19. Said spring 22 may be mounted between caps 21, 2st one of which caps may abut against adjustable nut 25 on the end of the rod 23 and the other of which caps may abut against lug 21. The cap. 21 adjacent the lug 21 is adapted to v abut against a shoulder 26 on the rod 23.

As will be apparent from the drawing. the rod :23 is adapted to extend through a hole in the lug :21. The spring 22 should be so designed that when the plunger 19 and rod 23 are moved to the right, the shoulder 26 will move the left hand cap 2i out of engagementwith the lug 21, whereby the lever 8 may move independently of said plunger 19 and the rod 23. However, when plunger 19 is drawn to the left, the left hand cap 2i will cooperate with the lug 21 to move the lever 8 in a direction to compact the compressible rheostat T.

The magnet 16 should be of the type known as short-pull magnet. Such magnets are well known in the art and need not It will be sutlicient to state that said magnet 16 should exert a strong pull against the spring 20 in a short distance of travel. Any preferred means may be provided for adjusting the magnet 16 whereby the tension of spring 20 may be overcome at the proper voltage. If preferred, the conical spring 20' mav be provided to supplement spring 20. Said conical spring :20 may be designed to compensate forthe increasing attractive efiect of the shortpull magnet- 16 as the plunger 19 reaches its attracted position.-

A mode of operation of the above described embodiment of thepresent inven tion is substantially as follows: hen the generator is inoperative, the demands of the translation circuit will be supplied by the storage batteryl, automatic switch 6 being open at this time. Unless the battery is at this time very highly charged, the resist' ance of the compressible rheostat 7 should be a minimum. The voltage developed at the terminals of the storage battery being practically equal to or only slightly greater thanthe normal voltage across the translatron circuit 5, the solenoid 17 will not be sufliclently energized to exert a strong pull against spring "20. Spring 20 will therefore urge plunger 19 and rod-23 toward the left, whereby said rod 23, acting through spring 22 and lug 21 will urge lever 8 to tightly compress, the compressible rheostat 7 whereby to reduce its resistance to a minimum. Only a very small drop in voltused, if desired.

age will occur, therefore. between the battery l and translation circuit 5. When the generator 1 develops a voltage sufficient to cause the closing of the automatic switch 6, the voltage impressed upon solenoid 17 will increase, whereby said solenoid 1? will ex-- ertits efi'ect in opposition to the spring 20 and will draw the plunger 19. with the rod 23, toward the right, removing the left hand cap 2i out of engagement with the lug 21 on the lever 8. Such action will leave the lever 8 free to be operated by the solenoid 13 through plunger 12 and bell No means for regulating the generator 1 01' for protecting the battery 1 from overcharge have been disclosed, inasmuch as no such means come within the scope of the present invention. Any of the well known means for producing such actions may be @ne embodiment of the has been described in detail. Many modifications will occur to those skilled in the art.

present invention 7 It is intended in this patent to cover all i such modifications that come within the scope of the present invention as defined in the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. In combination. a compressible rheostat, electro-magnetic means for controlling the -compiession of said rheostat, resilient means for tightly compressing said rheostat, and elect'ro-magnetic means for overcoming said resilient means whereby said first mentioned electromagnetic means may control said rheostat. i

2. In combination, a compressible rheostat, a movable member for controlling said rheostat, resilient means for urging said member to compress said rheostat, electromagnetic means for overcoming said resilient means, and other electromagnetic means for directly controlling-said meniber.

3. In combination, a. compressible pile, a translation circuit, means for tightly compressing said pile, electromagnetic means for rendering said means inoperative, and

electro-magnetic means for controlling said pile for regulating purposes.

4. In combination, a compressible pile, a

member for operating said pile, a plunger controlling said member, said plunger being plunger out of operative relation with said member and electromagnetic means for controlling movement of said member for regulating purposes.

5. In combination, a compressible pile, a

' lever for operating said pile, a member for ing the resistance in said circuit for regulating purposes, a pair of electromagnets connected across said translatlon circuit on opposite sides of said pile, mechanlsm controlled by one of said electromagnets for varying the compression of said pile in response to voltage changes, and means controlled, by the other of said electromagnets for urging said mechanism under' certain conditions to tightly compress said pile, said other electromagnet being adapted under certain conditions to remove said means from operative relation with said mechanism.

7. In combination, a circuit to be regulated, a compressible pile in said circuit, means biased to compress said pile to reduce its resistance to a minimum, means adapted, upon rise in voltage across said circuit to overcome said biased condition, and electromagnetic means'for'controlling said pile for regulating purposes.

8. In combination, a compressible pile, a member for operating said pile, said member being provided with an abutment, a. resiliently controlled member provided with abutting means cooperating with said abutment to compress said pile, electromagnetic means for eliminating cooperation between said abutment and said abutting means, and electromagnetic means for controlling said member for regulating purposes.

9. In combination, a compressible pile, mechanism for operating same, electromagnetic means for controlling said mechanism, Y

resilient means for biasing said mechanism to tightly compress said pile, and electromagnetic means for removing said resilient means out of cooperative relation with said mechanism.

In witness whereof, I have hereunto subscribed my name. a

' ERNST BAUER. 

